View Compilation Error

0_0_38639891_31553.cpp: In function 'int main()':
0_0_38639891_31553.cpp:15:3: error: 'memset' was not declared in this scope
   memset(dp,0x3f,n);
   ^~~~~~
0_0_38639891_31553.cpp:15:3: note: 'memset' is defined in header '<cstring>'; did you forget to '#include <cstring>'?
0_0_38639891_31553.cpp:4:1:
+#include <cstring>
 #define maxn 0x3f
0_0_38639891_31553.cpp:15:3:
   memset(dp,0x3f,n);
   ^~~~~~